München 2009 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 18: Beyond The Standard Model (Theorie) 2
T 18.1: Vortrag
Donnerstag, 12. März 2009, 16:45–17:00, M114
Higgs couplings in the MSSM at large tanβ — Martin Beneke1,2, Pedro Ruiz-Femenía1, and •Martin Spinrath3 — 1Institut für Theoretische Physik E, RWTH Aachen University, D–52056 Aachen, Germany — 2Institut für Theoretische Physik, Universität Zürich, CH – 8057 Zürich, Switzerland — 3Max-Planck Institut für Physik, Föhringer Ring 6, D–80805 München, Germany
We consider tanβ-enhanced quantum effects in the minimal supersymmetric standard model (MSSM) including those from the Higgs sector. To this end, we match the MSSM to an effective two-Higgs doublet model (2HDM), assuming that all SUSY particles are heavy, and calculate the coefficients of the operators that vanish or are suppressed in the MSSM at tree-level. Our result clarifies the dependence of the large-tanβ resummation on the renormalization convention for tanβ, and provides analytic expressions for the Yukawa and trilinear Higgs interactions. The numerical effect is analyzed by means of a parameter scan, and we find that the Higgs-sector effects, where present, are typically larger than those from the “wrong-Higgs” Yukawa couplings in the 2HDM.